Book.



E. DAVIS.

BOOK.

APPLICATION FILED NOV. 25. 1907.

Patented Mar. 9, 1909.

EUGENE DAVIS, ()l CHICAGO, ILLINOIS.

BOOK.

Specification of Letters Patent.

Patented March 9, 1909.

Application filed November 25, 1907. Serial No. 403,740.

To all whom it may conccm:

Be it known that I, EUGENE DAVIS, a citizeri of the United States of America, residing in Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Books, of which the following is a full, clear, and exact descrip tion, reference being had to the accompanying drawing, forming part of this specification.

My invention relates to novel forms of in-, dex sheets for books, such as loose leaf ledgers and it has for its object to provide index sheets that may be readily examined when the book containing them is in a closed as well as when it is in an open condition, and also to provide for the user'of the book locating any particular oint in the index sheets h t e wit least possi le difficulty without the necessity of turning the sheets of the index.

Figure I is a perspective view of a fragment of a book with my index sheets therein. .Fig. II is a face view of a fragment of one of the index sheets and .one of the tabs carried thereb Fig. III is a section taken through one o the tabs used upon the index sheets. Fig. IV is a face view of afragment of one of the index sheets of a modified form.

1 designates the sheets of a book which may be bound together in any desirable manner.

2 designates the index sheets. These index sheets are of reater dimensions than the book sheets, as i ustrated in Fig. I, so that they project beyond the edges of the book sheets to beexposcd to view when the book is in a closed condition. By extending the indexsheets beyond the edges of the book sheets I also provide for the application oi" tabs to said' index sheets in a manner to provide'clearance between the tabs on different index sheets and prevent the tabs from lying between the boo sheets when the book is closed. The various index sheets bear similar characters'or, si s and are rovided at their edges with gui e marks, pre erably produoed by notchmg the sheets, that are arranged in alinement with each other, transversely of the book. and throu bout the entire set 'of index sheets, there making it possible for the user oi the book to trace a substantiall distinct course leading from a certain character on an particular index sheet to a corresponding c laracter u )0!) any other underlying index sheet wit lent the necessity of first turning to'the underlying index sheet. The index sheets are provided with letters or other symbols disposed at intervals thereon and opposite to which the guide marks referred to are placed and inasmuch as the guide marks are placed correspondingly opositc these symbols in the various sheets it 18 possible for the user to readily trace a courscfrom a symbol that is in the plainest view to a corresponding symbol upon another index sheet which is not in as plain view as the one from which tracing is started. The guide marks referred to may be produced by notching the index sheets as seen at 3, Figs. 1 and II, or they may be produced by making the edges of the index sheets of waving form, as seen at 3, Fig. IV.

I rei'erably use upon the index sheets r'netaI tabs 4 having finger hold portions which are concave on one side and convex on the other, thereb providin a shape of tab that is very re di grasped between the finglets of a person's and and held between the ngers, while the index sheets are being turned in the book.

I claim:

1. In a book, the combination of book sheets, and index sheets distributed throughout the book between series of the book sheets projecting beyond the edges of said book sheets and each of which bears characters similar to those upon the other index sheets; said index sheets being proviced with guide marks located op )osite the characters thereon and so disposed in each index sheet as to be in alinement with the complementary guide marks on the otherindex sheets,

as described.

2. In a 00k, the combination of book sheets, and index sheets distributed throughout the book between series of thebook sheets projecting beyond the edges of said book sheets and eaclrof which bears characters similar to those upon the other index sheets; said. index sheets being provided with guide notches located opposite the charactors thereon and so disposed in each index Sheet as to be in alinement with the complewith a finger hold concave on one side and mentary fiuide notches on the other index convex on the other, substantially as set sheets, su stentially as described. forth.

3. In a book, the combination with a plu- EUGENE DAVIS. 5 rality of book sheets, of a plurality of index In presence of sheets; said index sheets having metal tabs WILLIS L. VVYMAN,

attached thereto, each tab being provided IIENRY IIOMEYER. 

